bliny vs flapcake

bliny and flapcake both are nouns.

Word	Noun	Adjective	Verb	Adverb
bliny	Yes	No	No	No
flapcake	Yes	No	No	No

As nouns, flapcake is a hypernym of bliny; that is, flapcake is a word with a broader meaning than bliny:

bliny: Russian pancake of buckwheat flour and yeast; usually served with caviar and sour cream
flapcake: a flat cake of thin batter fried on both sides on a griddle

Other hypernyms of bliny include battercake, flannel-cake, flannel cake, flapjack, griddlecake, hot cake, hotcake, pancake.

bliny (noun)	flapcake (noun)
Russian pancake of buckwheat flour and yeast; usually served with caviar and sour cream	a flat cake of thin batter fried on both sides on a griddle